Splitting of the chiral critical point and realization of solitonic pion condensate driven by isospin density

2012/06/13 by Yuhei Iwata, Iwata, Yuhei, Hiroaki Abuki +3
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Physics of Superconductivity and Magnetism

paper · pdf · doi:10.48550/arxiv.1206.2870

openalex publication_date 2012/06/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study the influence of the isospin asymmetry on the phase structure of strongly interacting quark matter near the tricritical point (TCP) using a generalized Ginzburg-Landau approach. The effect has proven to be so drastic, not only bringing about the shift of the location of TCP, but resulting in a rich fine structure at the vicinity of TCP. In particular, we find that an arbitrary small perturbation due to isospin density lifts the degeneracy of TCP making it split into four independent multicritical points. Accordingly, the homogeneous pion condensate and its solitonic counterpart come to occupy large domains in the Ginzburg-Landau coupling space.

Related

• Phases of QCD at nonzero isospin and strangeness chemical potentials with application to pion stars
• Quarkyonic picture of isospin QCD
• Pion condensation and QCD phase diagram at finite isospin density
• The QCD Tricritical Point: Beyond Monotony in Heavy Ion Physics
• QCD phase structure at finite isospin chemical potential and smaller-than-physical quark mass